Accompanied by motorcycle-mounted police, school buses carrying African-American students arrive at formerly all-white South Boston High School on September 12, 1974, the first day of federal court-ordered busing to achieve racial balance in the city's de facto segregated schools. Photo by Spencer Grant/Getty Images

Though the Brown v. Board ruling overturned Plessy v. Ferguson, it didn't suddenly solve the segregation problem and end racism in the United States.